Question:
To which value do torque signals refer, e. g. MI_dnTorqueHighLimit_n, MI_dnActualMotorTorque_n, TF_dnTorqueSet_n and C0056?
Answer:
The reference torque for standardized torque signals can be taken from the parameter C0057/2 reference torque motor. This value is calculated from the max. current in C0022 and the motor model determined by the motor parameters. Consequently, the reference is determined by the user. As a process parameter (variable) the reference torque can be taken from the motor interface LS_Motorinterface at the output MI_dwReferenceTorque.
The max. torque C0057/1 is the calculated max. value which can be reached with the device max. current of the servo drive. The motor can be operated with this torque provided that C0022 is set to the max. current.
Example:
An MCS 06C41 with a rated motor current of I_RatedMot = 1.3 A is operated at a 9400 servo drive with a rated device current of I_Rated = 1.5 A. For acceleration this device can shortly supply the fourfold rated current, this means I_max = 6 A. The MCS 06C41 could be operated by means of this theoretically available motor current with M_Acc = 2.72 Nm. The theoretical max. torque is indicated in C0057/2.
In fact, the max. available motor torque is determined by the max. current C0022 = 1.95 A (Lenze setting). This current makes available an acceleration torque of C0057/1 = 0.88 Nm.
